After all the great suggestions I started taking 1500mg of Glucosamine a day and I bought a Crampbuster lever.
I have been taking the glucosamine about six weeks and had the Crampbuster about a week and I have seen a marked improvement. I did a 200mile charity run on Sunday and didn't suffer any severe cramps or pain. Of course it did hurt a little but well short of making me stop or not enjoy the ride. It was a great ride 78 bikes and trikes riding through the Yorkshire Dales ( James Herriot country?) We raised 3,000 UK Pounds for Prostate Research.
I have also sourced a capsicum based rub that seems to work deep down so ill try that too.
Thanks for all the help.